Method and apparatus for supplying energy to an implant
First Claim
1. A system comprising an electrically powered medical device adapted to be implanted in a patient, in which system the medical device comprises an internal energy receiver arranged to power the medical device, the system also comprising an external energy source adapted to be located externally to the patient for wireless supply of energy to said internal energy receiver, the external energy source being equipped with a primary coil from which the external energy source is arranged to transmit said energy inductively to a first secondary coil in the energy receiver, the system being arranged to determine by measurements one or more parameters related to a first coupling factor between the primary and the first secondary coil, in which system the external energy source is adapted to transmit a first amount of energy to the energy receiver for enabling the medical device to detect information related to the first coupling factor, the system is adapted to wirelessly send feedback information related to said first coupling factor to the external energy source with the external energy source being arranged to receive said feedback information from the medical device and in that the external energy source is adapted to perform a predetermined action based on said feedback information, and wherein the system is adapted to let the first secondary coil be substantially without electrical load when measuring the first coupling factor.
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Accused Products
Abstract
A system is disclosed which comprises an implantable electrical medical device (100) with an internal energy receiver (102). The system also comprises an external energy source (104) located externally for supplying wireless energy to the internal energy receiver (102). The external energy source (104) has a primary coil (11) for transmitting energy inductively to a first secondary coil (10) in the energy receiver (102). The system is arranged to measure parameters related to a first coupling factor (C1) between the primary and the first secondary coil (10), and the external energy source (104) is adapted to transmit energy to the energy receiver (102) for enabling the medical device (100) to detect information related to the first coupling factor (C1). The medical device (100) is adapted to wirelessly send feedback information related to said first coupling factor (C1) to the external energy source (104) with the external energy source (104) being arranged to receive the feedback information and to perform a predetermined action based on said feedback information.
62 Citations
78 Claims
- 1. A system comprising an electrically powered medical device adapted to be implanted in a patient, in which system the medical device comprises an internal energy receiver arranged to power the medical device, the system also comprising an external energy source adapted to be located externally to the patient for wireless supply of energy to said internal energy receiver, the external energy source being equipped with a primary coil from which the external energy source is arranged to transmit said energy inductively to a first secondary coil in the energy receiver, the system being arranged to determine by measurements one or more parameters related to a first coupling factor between the primary and the first secondary coil, in which system the external energy source is adapted to transmit a first amount of energy to the energy receiver for enabling the medical device to detect information related to the first coupling factor, the system is adapted to wirelessly send feedback information related to said first coupling factor to the external energy source with the external energy source being arranged to receive said feedback information from the medical device and in that the external energy source is adapted to perform a predetermined action based on said feedback information, and wherein the system is adapted to let the first secondary coil be substantially without electrical load when measuring the first coupling factor.
- 21. A system comprising an electrically powered medical device adapted to be implanted in a patient, in which system the medical device comprises an internal energy receiver arranged to power the medical device, the system also comprising an external energy source adapted to be located externally to the patient for wireless supply of energy to said internal energy receiver, the external energy source being equipped with a primary coil from which the external energy source is arranged to transmit said energy inductively to a first secondary coil in the energy receiver, the system being arranged to determine by measurements one or more parameters related to a first coupling factor between the primary and the first secondary coil, in which system the external energy source is adapted to transmit a first amount of energy to the energy receiver for enabling the medical device to detect information related to the first coupling factor, the system is adapted to wirelessly send feedback information related to said first coupling facto he external energy source with the external energy source being arranged to receive said feedback information from the medical device and in that the external energy source is adapted to perform a predetermined action based on said feedback information, in which the energy receiver comprises a first switch adapted to switch a connection between the first secondary coil and the medical implant on and off, in order to enable the system to measure the first coupling factor when the connection is off.
- 39. A system comprising an electrically powered medical device adapted to be implanted in a patient, in which system the medical device comprises an internal energy receiver arranged to power the medical device, the system also comprising an external energy source adapted to be located externally to the patient for wireless supply of energy to said internal energy receiver, the external energy source being equipped with a primary coil from which the external energy source is arranged to transmit said energy inductively to a first secondary coil in the energy receiver, the system being arranged to determine by measurements one or more parameters related to a first coupling, factor between the primary and the first secondary coil, in which system the external energy source is adapted to transmit a first amount of energy to the energy receiver for enabling the medical device to detect information related to the first coupling factor, the system is adapted to wirelessly send feedback information related to said first coupling factor to the external energy source with the external energy source being arranged to receive said feedback information from the medical device and in that the external energy source is adapted to perform a predetermined action based on said feedback information, in which the internal energy receiver comprises an electronic component connected to the first secondary coil for preventing flow of electrical current between the first secondary coil and the medical implant during measurement of parameters related to the first coupling factor.
- 56. A system comprising an electrically powered medical device adapted to be implanted in a patient, in which system the medical device comprises an internal energy receiver arranged to power the medical device, the system also comprising an external energy source adapted to be located externally to the patient for wireless supply of energy to said internal energy receiver, the external energy source being equipped with a primary coil from which the external energy source is arranged to transmit said energy inductively to a first secondary coil in the energy receiver, the system being arranged to determine by measurements one or more parameters related to a first coupling factor between the primary and the first secondary coil, in which system the external energy source is adapted to transmit a first amount of energy to the energy receiver for enabling the medical device to detect information related to the first coupling factor, the system is adapted to wirelessly send feedback information related to said first coupling factor the external energy source with the external energy source being arranged to receive said feedback information from the medical device and in that the external energy source is adapted to perform a predetermined action based on said feedback information, in which the energy receiver comprises a half wave rectifying component for rectifying half of the pulse cycle of a received alternating current energy signal in the energy receiver, the system being adapted to measure parameters related to the first coupling factor during at least part of the non-rectified half of one or more pulse cycles.
- 61. A system comprising an electrically powered medical device adapted to be implanted in a patient, in which system the medical device comprises an internal energy receiver arranged to power the medical device, the system also comprising an external energy source adapted to be located externally to the patient for wireless supply of energy to said internal energy receiver, the external energy source being equipped with a primary coil from which the external energy source is arranged to transmit said energy inductively to a first secondary coil in the energy receiver, the system being arranged to determine by measurements one or more parameters related to first coupling factor between the primary and the first secondary coil, in which system the external energy source is adapted to transmit a first amount of energy to the energy receiver for enabling the medical device to detect information related to the first coupling factor, the system is adapted to wirelessly send feedback information related to said first coupling factor to the external energy source with the external energy source being arranged to receive said feedback information from the medical device and in that the external energy source is adapted to perform a predetermined action based on said feedback information, also being arranged to directly or indirectly measure over a predetermined period of time the difference between an electrical parameter related to the energy transmitted by the external energy source and an electrical parameter related to the amount of energy received by the internal energy receiver, and to determine the balance between said electrical parameters in order to determine said first coupling factor.
Specification